side exhibits large ign ##eous and meta ##morphic rocks deposited when the glaciers rec ##eded , which lie on a lateral mora ##ine . further up the eastern side there is a large ci ##r ##que with a small tar ##n . there are also lakes to both the north and south , turquoise and twin lakes respectively ; the twin lakes are a result of the natural dam of end mora ##ines , and turquoise lake was created by the man ##made sugar loaf dam . mount el ##bert is composed largely of quartz ##ite . however , the summit ridge consists of meta ##morphic basement rock , which is pre @ - @ cambrian in origin and about 1 @ . @ 7 billion years old
side exhibits large igneous and metamorphic rocks deposited when the glaciers receded, which lie on a lateral moraine. further up the eastern side there is a large cirque with a small tarn. there are also lakes to both the north and south, turquoise and twin lakes respectively ; the twin lakes are a result of the natural dam of end moraines, and turquoise lake was created by the manmade sugar loaf dam. mount elbert is composed largely of quartzite. however, the summit ridge consists of metamorphic basement rock, which is pre @ - @ cambrian in origin and about 1 @. @ 7 billion years old